Jack.



P. WAGNER.

IACK.

APPLICATION FILED lune 6.1915,

Lggl Pawntedme 12, A917.

PAUL WAGNER, OF SACO, MONTANA.

JACK.

maaar-se.

Specification of Letters Patent.

llatented June i2, 131'?.

AppIicaton filed June 6, 1916. Serial No. 101,973.

To all whom t may concern:

Be it known that I, PAUL lVAoNnn, a citizen of the United States,residing at Saco, in the county of Phillips and .State of Montana, haveinvented new and useful improvements in Jacks, of which the following isa specification.

This invention relates to a lifting jack and more particularly to thattype of jack which is provided with mechanism for raising the loadcarrying bar step by step.

The primary object of the invention 1s to provide a lifting jack of thischaracter which is constructed in such a manner'as to render the samecapable of withstanding considerable strain when in use.

Another object of the invention is to provide a jack in which. the loadcarrying bar is received in a collar pivotally connected with a. linkhaving a cam-face and connected with the load carrying bar raisingmechanism in such a manner that when said mechanism is operated thecam-face on the link will be brought into engagement with the loadcarrying bar and co-aet with the collar in forming a clutch by means ofwhich the load carrying bar may be raisedstep by step.

lVith these and other objects in view, the invention resides in thenovel combination and arrangement of parts, which will be hereinafterdescribed and particularly pointed out in the claim.

The preferred embodiment of the invention has been illustrated in theaccompanying drawing, although no restriction is necessarily made to theprecise details 'of construction therein shown, as changes, al-

terations, and modifications within the scope of the claim may beresorted toy when desired.

Like characters of reference denote corresponding parts throughout theseveral views in the drawing, in which:

Figure 1 is a side elevation partly in section of a jack constructed inaccordance with the invention and showing the load carrying bar raisedone step.

Fig. 2 is a verticallongitudinal sectional view through the jack showingthe lever included in the load carrying bar raising mechanism in aposition in which the clutch associated with said mechanism is releasedfrom engagement with the load carrying bar.

Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 1,

Fig. t is a detail view of the clutch associated with the load carryingbar raising mechanism disconnected from the jack.

Referring now to the drawing in detail7 the numeral 1 designates anelongated and rectangular shape base which may be formed from anysuitable material, said'base having connected therewith between its endsa support 2, forked as at 3, to provide spaced parallel arms 4L.

The base is provided, adjacent the support 2 with a transverselyextending opening 5, while each arm l has formed therein a row of spacedand transversely extending openings 6K Secured to the base 1 and support2 is an L-shaped bracket 7 which assists in connecting the support 2with the base 1 and serves as a brace therefor.

A plate S extends longitudinally of the support 2 for a portion of itslength and is provided with an arm 9 arranged at rightangles to thevplate and connected with the base 1 to enable the plate to assist inconnecting the support to the base and serving as a brace for thesupport, said arm having formed therein an opening 10 registering withthe opening 5 in the base.

The other end of the plate 3 has formed thereon a short arm 11 arrangedat rightangles to the plate and in spaced relation with the arm 9, saidarm being provided with an opening A12 alining with the opening 10 inthe arm 9 and ena-bling` the arm to serve as a guidefor a lead carryingbar hereinafter described.

A bracket 13 extends at right-angles to the arms 4 and has foi-inedthereon at one end a head 14e alinng with the arm 11 and l provided withan opening` 15 registering with the opening 12 in said arm.

The other end of the bracket 13 is forked to provide arms 1G cach ofwhich is bent to provide a portion lying at a right-angle to the head1li, said arms beingeonnect-edwith the arms at by bolts 1'? to enablethe bracket 13 to serve as a brace for the free ends of said arms.

A load carrying bar 13 passes through the openings in the head 1+i andarm 11 and has one end thereof received in the opening 5 in the base,the other end of the load carrying bar which extends above the opening15 is forked to form a head 19.

A collar 2O loosely encireles the load carrying bar above the head 11ion the bracket 13, said collar being provided with laterally extendingarm 2l terminating at its tree end in ay tapered gripping linger LLadapted for contact with the upper tace ot the bracket 13, so that thecollar 20 and arm Q1 are normally held in an inclined position withrelation to the bracket 13 to enable the collar to serve as a detent torthe load carrying bar 1S.

A itulcrum rod 23 extends transversely between the arms -land isremovably held in the openings b' by means ot nuts 94;.

rThe 'tulcrmn rod .23 passes through an opening near one end ot anoperating lever 25 to which is pivotally connected, as at 2G, a pair oitlinks 27.

A collar 29 is arranged between the head 1-2 and arm 11 to have passedtherethrough the load carrying bar 1S, said collar being split to formspaced arms Q9 with which is pivotally connected one end oit an arcuateshaped link 30 received between said arms and having its other endpivotally connected, as at 31, between the links 27 connected 'with theoperating lever One side edge ot the link i3() provides the link with a`cam-tace 32 having 'formed thereon tor the greater portion oit itslength teeth 38 which are adapted to be brought into contact with theload carrying bar 1S when the operating lever 25 is turned about itspivotal connection with the arms l to tightly wedge the load carryingbar between the link and collar, so that the link and collar may co-actin t'ornling a clutch by means of which the loa d carrying bar may beraised.

By pivotally connecting the link 30 with the collar 28 and providing thelink with the cam-tace 32, it will be seen that when a load is placed onthe load carrying bar 18 any tendency oi the load carrying bar to movedownwardly through the collar Q8 will cause the teeth 33 on the cam-tace32 to more tightly bind against the load carrying bar 1S.

then it is desired to use the jack, the 0perating lever Q5 is raiseduntil the collar 28 is brought into contact with the arm 11 whichenables the links 27 to move the link 30 to a position in which theteeth 33 on the link 30 will be out oit engagement with the loadcarrying bar 1S.

lith the lever still raised, the collar Q0 is manually raised to ahorizontal position at which time the load carrying bar will. be tree toslide through the openings in the heads 11 and l-land also the collar Q8until one end ot' the load carrying bar strikes the bottom of theopening 5 at which time the load carrying bar will be in its normal andlowered position.

The jack may now be positioned beside the weight to bc li'lted and theweight positioned on the head ot' the load carrying bar 1S.

Y The operator of the jack now starts to lower the operating lever 25,such movement causing the links 27 to turn the link 30 about its pivotalconnection with the arms 29 on the collar 28 and tightly wedge the loadcarrying bar between the teeth 30 and the collar Q8.

As the operating lever i5 turns about its pivotal connection with thearms il, the load carrying bar 18 is moved vertically upward by thecollar and link 30, such movement amusing the arm 21 to assume theposition in which the load carrying bar 18 is freely movable through thecollar 20.

llVhen the tree end ot the operator lever 25 reaches its limit otdownward movement, the weight ot the collar 2O causes the collar and arm21 to assume an inclined position with relation to the bracket 13, sothat when the operating lever is again turned about its pivotalconnection to cause the collar 2S to contact with the arm 1.1, downwardmovement ol the load carrying bar will be prevented.

The above described movement ot the operating handle is continued untilthe load on the load carrying bar has been moved a suitlicicnt distance:trom the ground. y

From the foregoing description, taken in connection with theaccompanying drawing, it is at once apparent that a jack has beenprovided in which the-load carrying bar operating mechanism has beenprovided with a collar and a link so connected with each other and withthe mechanism tor operating the load carrying bar that they provide aclutch which will firmly and quickly grip the load carrying bar toenable the same to be raised step by step when said mechanism isoperated.

Having thus described the invention, what is claimed as new, is:

In a device ot the class described,a base having an openingy therein, abracket on said base, a standard on the base having connection with saidbracket and braced thereby, a plate on said standard having an armconnected with the base and provided with an opening registering withthe opening in the base, a second arm on said plate overlying the irstmentioned arm and having an opening therein registering with the openingin the first mentioned arm and base, a lifting bar passing through theopenings in said arms and to extend within the opening in the base, andmeans for operating said lifting bar.

ln testimony whereol2 l affix my signature.

-PUL WAGNER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

y Washington, ID. C.

